Study on the Properties and Mechanism of U(Ⅵ) Adsorption of PPy/g-C3N4
YU Kun1, LIU Jinxiang1, XIE Shuibo1,2, LIU Yingjiu1, GE Yujie1
1 School of Civil Engineering, University of South China, Hengyang 421001, China 2 Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang 421001, China
Abstract: Polypyrrole/graphite phase carbon nitride (PPy/g-C3N4) composites were prepared by in-situ polymerization using graphite phase carbon nitride (g-C3N4) and polypyrrole (PPy) as raw materials to explore the adsorption performance of PPy/g-C3N4 to U(Ⅵ) in wastewater. The effects of pH, temperature, PPy/g-C3N4 dosage, reaction time and initial concentration of U(Ⅵ) on the adsorption of U(Ⅵ) on PPy/g-C3N4 were studied. The results showed that at pH=5, the initial concentration of U(Ⅵ) was 5 mg/L, the dosage of PPy/g-C3N4 was 200 mg/L, and the adsorption time was 20 min, the maximum adsorption rate of PPy/g-C3N4 to U(Ⅵ) was as high as 93.22%. The adsorption isotherm of U(Ⅵ) by PPy/g-C3N4 accords with the Freundlich model, and the adsorption kinetics accords with quasi-secondary kinetics. SEM-EDS and XRD analysis indicated that the PPy/g-C3N4 material was successfully prepared. The results of XPS and FTIR indicated that PPy/g-C3N4 contained carbon, nitrogen functional group and oxygen-containing functional group to cooperate with U(Ⅵ), which greatly improved its adsorption perfor-mance.
俞坤, 刘金香, 谢水波, 刘迎九, 葛玉杰. 聚吡咯/石墨相氮化碳复合材料吸附铀(Ⅵ)的性能与机制[J]. 材料导报, 2020, 34(23): 23020-23026.
YU Kun, LIU Jinxiang, XIE Shuibo, LIU Yingjiu, GE Yujie. Study on the Properties and Mechanism of U(Ⅵ) Adsorption of PPy/g-C3N4. Materials Reports, 2020, 34(23): 23020-23026.
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2020, Vol. 34 
